#VU91680 Use of uninitialized resource in Linux kernel - CVE-2021-47136 

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Main Vulnerability Database Vulnerabilities #VU91680

#VU91680 Use of uninitialized resource in Linux kernel - CVE-2021-47136

Published: June 10, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU91680
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47136
CWE-ID: CWE-908
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Linux kernel
Software vendor:
Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to use of uninitialized resource within the tcf_classify_ingress() function in net/sched/cls_api.c, within the mlx5e_tc_update_skb() function in drivers/net/ethernet/mellanox/mlx5/core/en_tc.c, within the mlx5e_rep_tc_update_skb() function in drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c. A local user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

External links